John koch



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JOHN KOCH, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHN KOCH, JR., OF SAME PLACE.

WINDOW-SCREEN.

SPECIFICATION forming part of Letters Patent No. 246,153, dated August 23, 1881.

Application filed July '7, 1881. (No model.)

To all whom it may concern Be it known that I, JOHN KOCH, of Brookline, in the county of Norfolk and State of Massachusetts, have invented new and useful improvements in mosquito bars or guards and appliances forming parts of same, which improvements are fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation, Fig. 2 a horizontal section, Fig. 3 a vertical transverse section, and Figs. 4 and 5 modified details, of my device.

The object of my invention is to make a mosquito-guard with its adjunctive devices,

(applicable to either the exterior or theinterior of the window-casing,) the sliding frame of which may by the principles of its own construction, in connection with devices hereinzo after described, be firmly retained in any position to which it may be raised or lowered, said frame being so constructed and of such materials as to be easily placedin or removed from its position for use, the whole to present z5 the least possible unsightliness or obstruction to blinds, curtains, or other appliances, and to be of moderate cost.

To accomplish this I construct the slidingframe, as above, of tempered steel or other 3o suitable elastic material, making the horizontal bars of such thickness in proportion to their length, regard being also had to the nature of the material employed, as will afford just that degree of iiexibility which will permit of its easy insertion into grooves in the guides, by bending it from a true plane to such a degree of curvature, as will allow of its being sprung into its position for use and yet be suitably rigid when in place, also, making the vertical 4o bars of such thickness in proportion to their length, regard being also had to the nature of the material employed, as will afford a sinuous flexibility sufficient for its adaptation to grooves of waved or other curving lines,to be 4 5 hereinafter set forth, and yet be sufficiently rigid to create, by the elasticity of the material, the necessary friction upon the faces or walls of the guiding-grooves to hold the sliding frame firmly atany desired position. Upon 5o this frame the netting is mounted, byrivetin g or otherwise, with the usual closing-bead. The

sliding frame, when in place, has the edges of its vertical frame-bars inserted in guiding grooves or channels formed in the strips or guides attached to the outer or inner faces of the window-casings. The channeled grooves are formed in the inner edges of these strips, and are sufficiently deep to receive and retain the sliding frames, and, also, if the guidingstrips are of wood, to receive, each, and sus- 6o tain, a vertical wire of iron or other suitable metal, recessed into and the whole length of the groove, against which wire the edgeof the metal sliding frame will be made to travel, for the purposeof preventing the framefrom plowin g out the wood,thereby deepening the grooves and preventing the perfect working of and even the retaining the frame in the guides, the grooves channeled in the guide-strips being formed in their alignment on such single 7o or compound curves or wave-lines as willproduce by the bending therein corresponding deiiection or deections in the elastic bars forming the sides of the sliding frame of the mosquito-guard, the compression or friction of surfaces so caused being sufficient to retain the frame at any desired position.

As an equivalent to the wire, and for the purpose of guarding the grooves from enlargement by the plowing process, to which there 8o is liability in the use of elastic metallic frames,

I either line the entire inner surfaces of the grooves with metal, bent or cast in the form of said grooves, as represented in Fig. 4, or else by rabbeting the guiding-strip, as represented in Fig. 5, and securing to said rabbeted recess a bar of cast metal in which the curved groove is cast or channeled, as exhibited.

By the use ofthe above methods I attain desirable facility in inserting and adjusting the 9o mosquito-guard, and more perfect results from their use.

By the use of the device of an elastic sliding frame the whole appliances may be made so thin and compact as to present the least possible projection from the window-Casin g, affordin g a neatness of finish and a degree of freedom from obstruction in the use of blinds, curtains, or other appliances not afforded by other adjustable guards.

The nature of the materials used, together with the forms of the devices, admits of the use of special tools in the construction of the frames, mounting the netting, and forming the grooves or channels, to secure desirable econonly, the cost of manufacture being less tha-n for other desirable frames.

The devices are illustrated more perfectly7 and in detail in the vertical section, Fig. 3, showing curved alignment of groove C; in the horizontal section, Fig. 2, exhibiting the groove C with the Wire D recessedinto same; in horizontal section, Fig. 4, exhibiting groove lined with metal form; and in horizontal section, Fig. 5, exhibiting rabbeted guiding-strip and cast-metal guiderattached, with curved groove in saine, A being the sliding frame, on which the netting Eis mounted B, the side or guiding strip, in the edge of which the curved groove is channeled; O,the curved groove, D, the wire, recessed in curved groove; H, the window-casing, to which the grooved guides are attached; J, the metal form, inserted in grooveO; K, the castmetal guide, with groove in same, attached to rabbeted wooden side strip.

I claim- 1. A mosquito-guard constructed with improved members, substantially as exhibited and described, consisting of an elastic sliding frame, A, running in curved grooves G channeled in guides B, in which grooves are Wires D, or in equivalent channeled cast-metal guides K, or lined guides J, all of the materials, as generallT set forth,for the purposes and bythe methods set forth or described.

2. An elastic sliding frame, A, ot a mosquitoguard, elasticin the manner and for the purposes set forth.

3. A curved groove, G, to guide a sliding frame, A, the groove kept intact by the use of the recessed Wire D, the metal lining J, or the cast-metal guide (rabbeted to side strip) K, each and all substantially as exhibited or described, and for the purposes set forth.

et. The combination of the elastic sliding frame A with the curved groove C, as and for the purposes described, exhibited, or set forth.

5. The combination ot' the Wire D or its equivalent metal form J, as set forth, with the groove C, into which it is recessed and by which it is sustained, as described, exhibited, or set forth.

6. rlhe combination of an elastic sliding frame, A, carrying the netting, the curved groove C, and the Wire D or its equivalent J, recessed into and sustained by the saine, all substantially as, in the manner, and for the purposes exhibited, described, or set forth.

JOHN KOCH.

Vitnesses:

ALBERT KNIEWEL, E. M. DARRACOTT. 

